Class CF_pattern

    object --+            
             |            
       cscRoot --+        
                 |        
             Facet --+    
                     |    
     ConstrainingFacet --+
                         |
        object --+       |
                 |       |
           cscRoot --+   |
                     |   |
_CollectionFacet_mixin --+
                         |
                        CF_pattern

Note: In PyXB, pattern constraints are ignored for any type with a Python representation that does not derive from basestring. This is due to the difficulty in reconstructing the lexical representation of a non-string type after it has been converted to its value space.

To Do: On creating new instances of non-string simple types from string representations, we could apply pattern constraints. That would mean checking them prior to invoking the Factory method.